Projector



Oct. 3, 1933. E. p KNOX 1,929,360

v PROJECTOR Filed June 2l. 1952 2 Sheets-Shf-:eiI 2 BYmYa.

Patented Oct. 3, 1933- PBOJECTQR Edward P. Knox,

Toms River, N. E.

Application June 21, 1932. Serial No. 618,539

Claims.

This invention relates to projectors and has for an object to provide a simplified projector capable of using individual slides or illms of various kinds, the structure being such thatthe 111m when used may be passed directly through the machine or maybe reversed before passing through the machine.

Another object of the invention is to provide a simplified projector using an electric lamp or other source of light which acts to project a picture on a given surface, and also to illuminate a ground glass over which the film to be projected passes, the ground glass acting as a table for permitting a person to write on the nlm. l5 A further object of the invention is to provide a projector for films using a reel structure which may be swung from one position tothe other so as to direct a reel directly through the machine 'or first past a writing table, and then to the projecting portion of the machine after having moved over a reversing device.

A still further object is to provide in a projector an adjustable lens structure arranged in such a way that a slot is provided for the insertion of colored members 'whereby the color of the projected picture may be varied.

In the accompanying drawings- Figure 1 is a side view of a projector disclosing an embodiment of the invention.

3 Figure 2 is a sectional view through Figure 3 on line 2 2.

Figure .3.is a top plan shown in Figure 1. y Y Y Figure 4 is a front view oi the structure shown 35 in Figure 1, the lower part being shown in section for illustrating the mounting of one of the reels.

view of the structure Figure 5 is a side `view of a colored slide. Figure 6 is a sectional view through Figure 5 4 on une s-s illustrating how the `side le e looped member of paper or other material with a colored sheet arranged loosely therebetween.

Referring to the accompanying drawings by numerals, 1 indicates the body oi the projector 45 which has depending legs 2 connected with e base 8. The body 1 is hollow, as shown in Figure 2, and provided with a lens 4 supported by a holder 5, the purpose of the lens 4 is for the concentration or intensification of the light from 5 the lamp through the positioning of a. spot of light bearing directly on the forward projection lenses and 1l. This arrangement is of advantage'where expensive, high powered lamps are not used as a lighting medium. In back of 55 the lens 4 is a tubular support 6 on which the (Gl. gil-24) lamp holder or carrier 7 is slidingly mounted. An electric lamp 8 is shown as being carried by the holder 7 and supplied with current in any desired manner. The holder 7 is held in place by friction and may be slid back and forth to adjust the position oi the light 8 in order to secure desired results.

A lens-carrying bracket 9 is secured in any desired manner to the body 1 and is adapted to support a stationary lens 10 and a sliding lens 1'1, which latter lens is mounted in a sliding sleeve l2. 'Ihe bracket 9 is shown as square and hollow so that the sleeve l2 may freely -slide but cannot rotate. The frame of the lens 10 is held in place by a suitable abutment 13 so that normally it is held stationary but may be removed at any time. The sleeve 12 is adapted to be adjusted to any desired position and then locked by the set screw 58, the lens ll being locked in place by strap 14, which strap is adapted to be swung toward the front and downwardly out oi the way when the lens 11 is to be removed.

As shown partlcularlyin Figure 2, there is provided a passageway 15 in between part of the bracket 9 and the body 1,l whereby a strip or lm 16 may readily pass between the lenses 4 and 10 along side of the outer surface of the body 1. The strip or film 16 is adapted to be wound on a spool 17. said spool preferably having a solid core 18, as shown in Figure 4, and provided with a square bore 19 and a round bore 20, bore 20 being adapted to receive a round pin l21, while the squared end 22 of shaft 23 extends into the bore 19. A pinion 24 is rigidly secured to the shaft 23 and continually meshes with the gear 25, which gear is provided with a knob 26, whereby the gear may be rotated, and, consequently, the reel 17 rotated.

The shaft 23 is supported on a stationary standard 27 secured by screws or otherwise to the base 3, while the pin 21 is supported by an adjustable standard 28. The standard 28 has a slotted foot 29, and one or more screws 30 extend through the slot in this toot and into the base,3, whereby the standard 28 may be locked in any desired adjusted position. When it is desired to remove the reel 17, screw 30 is loosened and the standard 28 moved away from the standard 27, after which the pin 21 is removed and then the reel 17 slid oi of the squared end 22. The parts are replaced by reverse action.

By making the standard 27 stationary, and the reel 17 lightly pressing against the washer 31, the reel 17 is in proper alignment with the slot 15 32 isin the dotted position shown in Figure 2 and isf and with the respective lenses. This reel is used when a film is used, and the nlm may be moved downwardly at any rate of speed continuously, or may be moved intermittently according to circumstances. The upper reel 32 coacts with the reel 17 to support the nlm 16 and permit a movement thereof. Where the nlm or transparent strip 16, of celluo1id, cellophane or other material, is.provided with groups of pictures, or written or printed matter, preferably the Areel 17 is operated intermittently to' show these' groups independently as still pictures. Where a film may have a complete story or other matter, written thereon, and the same extends from one end of the nlm to the other, the nlm is usually moved by the reel 32 and the movement is upf wardly and slowly so that the respective lines will successively move into the line of vvision and then upwardly and out of the line of vision. This method of disseminating information has been known in the moving picture art, but the structure used there is different from the structures used heretofore, though the result, as far as the gradual changing of the reading matter is' concerned, is the same.

When the nlm is used as just described, the reel is`.operated by a person actuating the knob 33, which is secured to the gear wheel 34, said gear wheel continually meshing with the pinion 35.

The pinion 351s rigidly secured to the shaft 36 which is identical in structure with the shaft 23, and which coacts with the pin 37, identical with pin 21. However, shaft 36 is journaled into the outer end of a swinging arm 38, and pin 37 is journaled into the outer end o f aswinging arm 39. The arm 38 is pivotally. mounted at 40 on top of the body 1, while the arm 39 is pivotally mounted on a bracket 42, as shown in Figure 3,

" said bracket having a slot 43 through which a clamping screw 44 extends, whereby this bracket may be slid back and forth to permit thel reel 32 to be removed in a similar manner to the way the reel 17 is removed.

4 Where the nlm has been previously prepared the same is moved upwardly or downwardly as desired with the upper heel in the dotted position shown in Figure 2. However, where matter is to be written on the nlm or strip 16, or'pictures are tobe, drawn thereon, the reel 32 is swung over to the position shown in Figure 2. and the film is threaded beneath the guide bar 45 and over a ground glass plate 46, and from thence into a reversing guide 47. The reversing guide l47 is provided with suitable ears 48 secured to the body 1 by suitable screws 49. The parts shown in Figure 2 are arranged in the position just described so that when the reel -17 is rotated the nlm will be drawn over the reel 32, passed over the ground glass support or table 46, through the reversing' guide 47, and then down through the slot or opening 15 past the beam of light provided by the lamp 8. When the device is used as just described, a sheet metal plate 50 is removed. When this take place there is enough dinused light from the lens 4 to somewhat illuminate the table or plate 46 so that a person may'readily write on the nlm, the same being stationary. In order that the person writing or drawing on the nlm may be somewhat guided, a number of cross lines 51 `(Figure 3) are etched or otherwise formed on-the table or glass plate 46. For instance, when election returns are; being projected on a sreen, the arrangement shownin Figure 2 is de -35- sirable asthe operator may writeor draw any desired information on-the nlmand then move the same to the position in front of the light. As the returns come in the, operator willwrite on the nlm immediately above the plate 46 all that -when writing anything on the nlm, the same may be arranged to be in lines and successively pass a beam of light or may be all confined in the prescribed space for one exposure. Where the writing or figures are continuous, the nlm will be moved slowly-past the projected light, but where the writing is arranged in groups of a size to provide one exposure, the nlm is moved intermitently; When a certain group of information is opposite the light, the'fllm is stopped for any desired length of time.

Illustrated particularly in Figures 1 and 2 is a slot 52 provided inthe bracket 9 and positioned between the forward lenses, whereby a colored glass plate, or a piece o'f celluloid, cellophane, or other transparent or semi-transparent material may be inserted between the forward. lenses changing the color or shape of the picture or other A matter projected. While a glass plate or.

other colored sheet may be used it has been foundj that a very simple and cheap slide will produce' very good results. In Figure 5, a piece of paper 53 has been folded and provided with apertures' 54 and 55 so that when a piece of colored cellophane or other colored transparenter semi-trans parent material 56 is inserted, the aggregation' may be slipped into the slot 52 and' produce the desired color on the screen. Where the nlm 16 is not being used, but slides are to be use d,'they= may be inserted through the slot 57 as shown in Figure 1.

If desired, the strap 14 could be eliminated andl the lens ll-locked in any desired position. However, the strap 14 functions to hold the block or plate 59 in place and thereby prevents'any accidental removal oi-loose motion on the lens 11.

twisted to secure one reversal of the nlm asit.

moves from the table .46 to the slot 15. The guide 47 is made out of nat sheet material and the edges 60 and 61 are turnedover to provide over. hanging shoulders, and therebypresent in a'cerf tain sense side grooves for receiving the side por' tions of the nlm vas it passes over the guide, When' the reel 32 is in the dotted pomtion shown in Figure 2, the reversing guide 47 is removed.

I claimz- 1. A projector of the character described iii-. cluding suitable projecting lenses, means for projecting light through said lenses, means for giiid-l ing anim pastsaid lenses, a reversing guide for. said nlm, and means for guiding the nlm to said reversing guide said reversin'gguide comprisingv a sheet strip having the edges turned toward each.- other to provide nlm guidinggrooves, said strip; beingtwisted so that at one end said inturned edges areon one sideof the strip and at the other Vend'they are on the opposite side.

iin-upper reeLalowerreel, said reels being adapted to move a lm past said lenses, means for swingably mounting the upper reel so that the upper reel when in one when the upper reel is in back of the projector.

3. A projector including a body having a translucent plate at the upper end, projecting lenses carried by the body, a lamp for supplying light through said lenses, said lamp and certain of said lenses permitting some of the light to pass through said translucent plate, a pair of reels fora film, one of said reels being arranged near the bottom and iront of the'body and the other near the top and rear of the body, said last-mentioned reel holding the illm so that it may be moved across said translucent plate, and a reversing guide for receiving said lm after it passes said plate, said reversing guide directing the film past said lenses to the lower reel.

4. In a projector, a body, a lower forward reel and 4an upper rearward reel, a platform, means for guiding a lm from said upper reel over said platform whereby the film may be written upon while in position over the platform, a reversing guide for receiving and reversing the film after it leaves said platform, said reversing guide di recting the film in a reversed position to said forward reel, and means includinga light and lenses for projecting the matter` on the reel.

5. In a projector, a body, projecting lenses carried by the body, means forming a slidway for the reception of a colored member for changing the color or shape of a projected picture, said slideway being positioned between the forward projecting lenses carried by the. body, a slide removably fitted in said slideway, said slide in-l cluding an apertured folded strip of paper forming a support U-shaped-in cross section and a colored substantially transparent sheet arranged between the folds of saidstrip, and means for removably positioning said slide so that the mat-.-

ter thereon may be projected.

EDWARD P. KNOX. 

